Level



A. MORRIS HLED M Mar. 13, 1923.

Patented Mar. 13, 1923.

UNET E E ST naaai LEVEL.

Application filed May 25,

To all whom it may concern:

Be it known that 1, ANDREW MORRIS, a subject of the King ofGreat Britain, and a resident of Powell'R-iver, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in Levels, ofwhich the following is a specification.

This invention relates to improvements in levels, and the object of the invention is to devise a level which is particularly adapted for aviation purposes and which is of simple and inexpensive construction while at the same time being quick-acting, sensitive andaccurate, and of a highly practical and eflicient character.

This object is attained by the construction illustrated in the accompanying drawings in which i Fig. lis aside view of the device.

Fig. 2 is an end view.

Fig. 3 is a plan view.

Similar figures of reference indicate similar parts throughout the several views.

The device is formed of any suitable material and consists of a rectangular base 1 at the opposite ends of which are erected standards 2 and 8 also of rectangular formation and of suitable height, and extending longitudinally of the base along its longitudinal axis is a rib a the edge of which is formed concave, as indicated at 5 in Fig. 1. Swingably supported between the standards 2 and 3 on needle point or other type bearings 6 and 7 is a semi-circular ring member 8, which member is hung edgewise so that its loweredge lies adjacent the upper edge of the rib 4 and on each side it is pro vided with stiffening ribs 9 and 10 respectively. This member is graduated in degrees adjacent its upper edge and is provided in termediate its ends with oppositely extending transverse arms forming a second semicircular ring member 11 also provided with stiffening ribs 12 and 13, which ring is also disposed edgewise and is graduated. adjacent its lower edge, as shown in Fig. 2. The ends of the member 11 are formed as bearings let and 15 in which are freely mounted journals 16 and 17 provided at the upper ends of a third semicircular ring member 18, thismember normally depending vertically edgewise within the member 11, as shown in Fig. 2, while mounted between the upper ends of the ring 18 is an annular ring 19 within which is mounted a mariners compass 20, the

1921. Serial No. 472,490.

compass being securely. held place by screws 21 passed through the ring 19. The

ring v19 is braced to the third mentioned member 18 by suitablebraces 22, as shown in Fig. 2.

will-be readilyapparent, as it will be seen that when placed-in a suitable position on a flying machine, for instance, any inclination from the horizontal position fore and aft will cause the member 8 and therefore the member .11 to swing forwardly .or rearwardly so that the amount ofinolination may be read from the index on member 11, using the rib 1 as an indicator,-while any inclination either-to one side or the other will cause the third member. 18. to, swing to ards at each end and a rib lying along its The manner 1n which the device operates longitudinal axis, a semi-circular member.

having its ends pivotally connected to said standards, arranged between the latter and graduated adjacent its upper edge, oppositely extending curved arms arranged intermediate the ends, of said semi-circular member and having their lower ends connected to the latter, said arms being arranged at an angle to the semi-circular member and forming a second semi-circular member graduated adjacent its lower edge, and a third semi-circular member arranged within the second semi-circular member and pivotally supported by the latter.

2. A device as claimed in claim 1 having a ring mounted between the ends of the third. member.

3. A device as claimed in claim 1 having an annular ring mounted between the ends of the third member, braces connecting said ring to the third member, and means for Se curing a compass within the ring.

a. A device of thecharacter described,"

comprising a base provided with a vertical standard at each end, a centrally disposed rib extending longitudinally alongthe upper surface of the base and connected to the standards to reinforce and embrace the same, a semi-circular member having its ends pivoted to sald standards and normally suspended therein in parallel relation with said rib,

the upper edge of said member being graduated, a second similar member connected to and disposed angularly to the first memher and having its lower edge graduated, said second member intersecting the first member, a third semi-circular member pivotally connected tothe second member and arranged within the latter and adapted to normally rest in parallel relation to the second member and adapted when swinging to either side to traverse the graduated edge of the first member, an annular ring pivotally connected to the third member, and means for supporting a compass within said ring.

5. A device of the character described, comprising a base provided with a vertical standard at each end, a centrally disposed rib extending longitudinally along the upper surface of the base between'the standa-rds, a semi-circular member having its ends pivoted'to said standards and normally suspended therefrom in parallel relation with said rib, a second similar member arranged intermediate the ends of the first member, disposed angularly to the latter and having its lower edge graduated, and

means for supporting a compass between the ends of the second member.

6. A device of the class described including a base provided with standards, a semicircular graduated member arranged between said standards and having its ends pivotally connected to the latter, a second semi-circular graduated member arranged intermediate the ends of and angularly to the first member, said members being operatively connected together, means forsupporting a compass between the ends of the second member, and a normally upright compass carried by said means. I

7. A device of the class described including a graduated semi-circular member having its ends pivotally mounted and adapted to swing about a normally horizontal axis, oppositely extending curved arms arranged at angles to the semi circularxmember and having theirlower ends connected to said semi-circular member, said arms'forming a second semi-circular member provided with graduations, supporting means pivotally connected to said second member, a" compass carried by said supporting means, and a fixed indicator adapted to cooperate with the graduations of the second member.

Dated at Powell River, B. 0., this 13'day of May, 1921.

ANDREW MORRIS. 

